A standalone Steam Link client for desktop Linux is available as a Flatpak
app: https://flathub.org/apps/details/com.valvesoftware.SteamLink

Discussion: https://steamcommunity.com/app/353380/discussions/10/

Please note that Valve has *not* given permission to redistribute the Steam
Link app binaries, other than via the official Flatpak package on Flathub.